ㄅㄨˋㄒㄧㄠˋxiàoㄧㄡˇyǒuㄙㄢsānˊㄏㄡˋhòuㄨㄟˊwéiㄉㄚˋ

  1. 諺語)​古人認為不孝沒有後代重要孟子·離婁》:孟子不孝有三,無後為大。』」··不孝三事阿意曲從不義不孝不為祿不孝先祖不孝。」··》:聖人男子。』不孝有三,無後為大。』」

There are three ways to be unfilial; having no sons is the worst. (citation from Mencius 孟子[Meng4 zi3])​